Coated article having low-E coating with absorber layer(s)

ABSTRACT

A coated article is provided, having a coating supported by a glass substrate where the coating includes at least one color and/or reflectivity-adjusting absorber layer. The absorber layer(s) allows color tuning, and reduces the glass side reflection of the coated article and/or allows sheet resistance of the coating to be reduced without degrading glass side reflection. In certain example embodiments the absorber layer is provided between first and second dielectric layers which may be of substantially the same material and/or composition. In certain example embodiments, the coated article is capable of achieving desirable transmission, together with desired color, low reflectivity, and low selectivity, when having only one infrared (IR) reflecting layer of silver and/or gold. Coated articles according to certain example embodiments of this invention may be used in the context of insulating glass (IG) window units, monolithic windows, or the like.

Certain example embodiments of this invention relate to a coated articleincluding a glass substrate supporting a low-E coating, where the low-Ecoating includes at least one absorber layer for controlling colorand/or reflectivity of the coated article. The coated article may beused in an insulating glass (IG) window unit in certain exampleembodiments.

BACKGROUND OF THE INVENTION

Coated articles are known in the art for use in window applications suchas insulating glass (IG) window units, vehicle windows, and/or the like.It is known that in certain instances, it may be desirable to heat treat(e.g., thermally temper, heat bend and/or heat strengthen) such coatedarticles for purposes of tempering, bending, or the like.

Insulating glass (IG) windows are known in the art. Conventional IGwindow units include at least first and second glass substrates (one ofwhich may have a solar control coating on an interior surface thereof)that are coupled to one another via at least one seal(s) or spacer(s).The resulting space or gap between the glass substrates may or may notbe filled with gas and/or evacuated to a low pressure in differentinstances. Some IG window units are tempered. Thermal tempering of theglass substrates for such IG units typically requires heating the glasssubstrates to temperature(s) of at least about 580 degrees C. for asufficient period of time to enable thermal tempering. Monolithicarchitectural windows for use in homes or building are also known in theart, and can include a coating supported by a glass substrate. Fixturewindows in homes may be made of glass sheets. Such monolithic windowscan also optionally be thermally tempered for safety purposes. Heattreatment (e.g., thermal tempering) of coated articles typicallyrequires use of temperature(s) of at least 580 degrees C., morepreferably of at least about 600 degrees C. and still more preferably ofat least 620 degrees C.

In certain situations, designers of coated articles often strive for acombination of desirable visible transmission, desirable color, lowreflectance, low emissivity (or emittance), and low sheet resistance(R_(s)). Low-emissivity (low-E) and low sheet resistance characteristicspermit such coated articles to block significant amounts of IR radiationso as to reduce for example undesirable heating of vehicle or buildinginteriors. Designers of coated articles also seek to have particularcolor appearances (e.g., when viewed from outside of a building orvehicle on/in which the coated article is mounted) and/or low visiblereflectance. Typically, thick IR reflecting layers (e.g., silver basedlayers), while blocking IR, cause visible reflectance to increase. Thus,it the past it has been difficult to achieve a combination of good IRblockage and at the same time reduced or relatively low visiblereflectance.

In view of the above, it will be apparent to those skilled in the artthat there exists a need in the art for a coated article having one ormore of desirable visible transmission, desirable color, lowreflectance, low emissivity (or emittance), and/or low sheet resistance(R_(s)). In certain example embodiments, it will be apparent that thereexists a need in the art for a coated article (e.g., for use in an IGwindow unit) which can achieve a combination of desirable color (e.g.,desired a* and/or b* values), fairly low visible reflectance, lowemissivity and/or sheet resistance, and desired visible transmission.

BRIEF SUMMARY OF THE INVENTION

A coated article including a low-E coating supported by a substrate(e.g., glass substrate) is provided in certain example embodiments ofthis invention. In certain example embodiments, the coated article hasone or more of desirable visible transmission, desirable color, lowreflectance, low emissivity (or emittance), and/or low sheet resistance(R_(s)). In certain example embodiments, the coated article (e.g., foruse in an IG window unit) can achieve a combination of desirable color(e.g., desired reflective a* and/or b* values), fairly low visiblereflectance, low emissivity and/or sheet resistance, and desired visibletransmission. As used herein, a “coated article” can be or include amonolithic coated article and/or an IG unit.

In certain example embodiments of this invention, a color and/orreflectivity-adjusting absorber layer of the low-E coating is includedin order to permit the coloration and/or reflectivity of the coating(and coated article) to be selectively controlled. The coated articlemay have a bronze, green, neutral, blue, or other color tint indifferent example embodiments. Glass side (or exterior) visiblereflectance of the coated article may advantageously be reduced. Incertain example embodiments, the absorber layer is included to form acoated article with color properties and/or reflectivity that are moreeasily controllable/tunable, and which may have a reduced glass sidereflectance (Y_(g) and/or R_(out)). Advantageously, inclusion of thecolor and/or reflectivity-adjusting absorber layer between dielectriclayers, together with manipulating the thicknesses of other layer(s)present in the low-E coating, has been found to reduce glass sidereflectance and produce tunable desirable tints such as bronze, green,neutral, and blue, while at the same time permitting a relatively thickIR reflecting layer to be utilized if desired. In other words, inclusionof a color and/or reflectivity-adjusting absorber layer has been foundto provide tunable bronze, green, neutral, and/or blue tinted coatedarticles which indicates that desired color can be achieved, and/orallows a combination of acceptably low visible reflectance and lowemissivity and/or sheet resistance.

Glass side (or exterior) color (e.g., a*_(g) and/or b*_(g) values) canbe optimized based on the thickness and materials/composition of theindividual layers in the low-E coating in certain example embodiments,which is advantageous from aesthetic and architectural perspectives.Additionally, good solar properties (e.g., low sheet resistance andacceptable visible transmission) are also possible in certain exampleembodiments of the coatings disclosed herein. It is noted that a*_(g)and b*_(g) color values herein refer to glass side reflectivecoloration, as viewed from the glass side of a monolithic coated articleor from the side of an IG window unit adapted to face the exterior ofthe building or structure.

In certain example embodiments of this invention, there is provided abronze colored coated article comprising a coating supported by a glasssubstrate, the coating comprising moving away from the glass substrate:a first dielectric layer comprising silicon nitride; a first contactlayer; an IR reflecting layer comprising silver; a second contact layer,the first and second contact layers each directly contacting the IRreflecting layer; a second dielectric layer comprising silicon nitride;and wherein at least one of the first and second dielectric layerscomprising silicon nitride is split by a substantially metallic absorberlayer comprising NiCr and/or NbZr so as to have first and second spacedapart layer portions comprising silicon nitride with the substantiallymetallic absorber layer comprising NiCr and/or NbZr directlytherebetween, the absorber layer being provided so that coated articleis bronze colored.

In certain example embodiments of this invention, there is provided abronze colored insulating glass (IG) window unit including first andsecond glass substrates and a coating supported by at least the firstglass substrate, the coating comprising moving away from the first glasssubstrate: a first dielectric layer; a color and/orreflectivity-adjusting absorber layer; a second dielectric layer; afirst contact layer; an IR reflecting layer comprising silver; a secondcontact layer; and a third dielectric layer, wherein the IG unit has avisible transmission of from about 20 to 50%, an a*_(g) of from about 0to 3.0, a b*_(g) of from about 0.0 to 3.0, and a glass side visiblereflectance (Y) of no more than about 16%.

In other example embodiments of this invention, there is provided abronze colored insulating glass (IG) window unit including first andsecond glass substrates and a coating supported by at least the firstglass substrate, the coating comprising moving away from the first glasssubstrate: a first dielectric layer; a color and/orreflectivity-adjusting absorber layer comprising Nb and/or Zr; a seconddielectric layer; a first contact layer; an IR reflecting layercomprising silver; a second contact layer; and a third dielectric layer.

In still further embodiments of this invention, there is provided abronze colored insulating glass (IG) window unit including first andsecond glass substrates and a coating supported by at least the firstglass substrate, the coating comprising moving away from the first glasssubstrate: a first dielectric layer; a first contact layer; an IRreflecting layer comprising silver; a second contact layer; and a seconddielectric layer; a color and/or reflectivity-adjusting absorber layer;and a third dielectric layer, wherein the IG unit has a visibletransmission of from about 20 to 50%, an a*_(g) (glass side) of fromabout 0 to 3.0, a b*_(g) (glass side) of from about 0.0 to 3.0, and aglass side visible reflectance (Y) of no more than about 16%.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view of a coated article according to anexample embodiment of this invention.

FIG. 2 is a cross sectional view of an insulating glass (IG) unit, whichmay include the coated article of any of FIG. 1 or 3-5.

FIGS. 3( a) and 3(b) are cross sectional views of coated articlesaccording to other example embodiments of this invention.

FIGS. 4( a), 4(b), and 4(c) are cross sectional views of coated articlesaccording to further example embodiments of this invention.

FIGS. 5( a), 5(b), and 5(c) are cross sectional views of coated articlesaccording to still further example embodiments of this invention.

DETAILED DESCRIPTION OF THE INVENTION

Coated articles according to example embodiments of this invention maybe used in applications such as IG window units, vehicle windows,monolithic architectural windows, residential windows, and/or any othersuitable application that includes single or multiple glass substrates.Like reference numerals in the various figures refer to likeparts/layers herein.

Sheet resistance (R_(s)) is indicative of emissivity or emittance. Lowsheet resistance is achieved in certain example embodiments of thisinvention, in combination with desired color and reflectance values, dueto the present of the absorber layer(s). In certain example embodimentsof this invention, a coated article realizes a sheet resistance (R_(s))of no greater than about 10.0 ohms/square, more preferably no greaterthan about 9.0 ohms/square, even more preferably no greater than about5.0 ohms/square, even more preferably no greater than about 4.0ohms/square, and possibly or most preferably less than or equal to about3.5 ohms/square. These sheet resistance values, applicable to anyembodiment of this invention, may be before and/or after optional heattreatment such as thermal tempering of the coated article. In certainexemplary embodiments, a sheet resistance of no greater than 3.0ohms/square may be possible. Low sheet resistance values are indicativeof low emissivity.

In certain example embodiments of this invention, a low-E coatingcomprises a single IR reflecting layer comprising silver and/or gold,although this invention is not so limited in all instances. While othernumbers of IR reflecting layers may sometimes be provided, the use ofone is preferable in certain instances in that low-emittance can beachieved and more such layers are not required thereby making coatingseasier and cost effective to manufacture and less susceptible to yieldproblems.

In certain example embodiments of this invention (e.g., see FIGS. 1-5),coated articles may or may not be heat treated (e.g., thermallytempered). In certain example embodiments (e.g., see FIGS. 1-5), coatedarticles may have an emissivity (normal and/or hemispherical) of no morethan about 0.12, 0.11, and/or 0.10, more preferably no more than about0.06, even more preferably no more than about 0.05, and most preferablyno more than about 0.04 (e.g., 0.037). In certain example embodiments,following heat treatment and as measured in monolithic form, coatedarticles (e.g., see FIGS. 1-5) before and/or after HT are capable ofrealizing a visible transmission (Ill. C, 2 degree) of up to about 60%,more preferably up to about 50%, and most preferably no higher than 45%or 40%. In certain example embodiments, the coated article has a visibletransmission of from about 20-50%, more preferably from about 30-48%, inmonolithic and/or IG unit form.

Solar factor (SF, or g-value), calculated in accordance with EN standard410, relates to a ratio between the total energy entering a room or thelike through a glazing and the incident solar energy. Thus, it will beappreciated that lower SF values are indicative of good solar protectionagainst undesirable heating of rooms or the like protected bywindows/glazings. For example, a low SF value is indicative of a coatedarticle (e.g., IG unit such as a double or triple glazing) that iscapable of keeping a room fairly cool in summertime months during hotambient conditions.

While low SF values are typically desirable for coated articles such asIG window units, the achievement of lower SF values typically comes atthe expense of visible transmission and/or coloration. It is oftendesirable, but difficult, to achieve a combination of an acceptablevisible transmission, desirable glass side coloration, and a low SFvalue for a coated article such as an IG window unit or the like. Inthis regard, the ratio between visible transmission (T_(vis)) and SF issometimes referred to as “selectivity.” In other words, the“selectivity” of a coated article is defined by T_(vis)/SF. Highselectivity values are often desirable, because this combines high ordesirable visible transmission with a low SF value which is indicativeof good IR blockage.

In certain example embodiments of this invention, a coated article isprovided with a layer stack which may permit the coated article toachieve one or more of good selectivity (T_(vis)/SF), an acceptablesolar factor (SF), and/or low emissivity. One, two, three, or all ofthese features may be achieved in different embodiments of thisinvention (e.g., see FIGS. 1-5). When good selectivity (T_(vis)/SF) isachieved, there is provided a higher ratio of visible transmission(T_(vis)) to solar factor (SF), which will be appreciated by thoseskilled in the art.

In certain example embodiments of this invention (e.g., see FIGS. 1-5),a coated article such as an IG window unit realizes a selectivity value(T_(vis)/SF) of at least about 1.12 or 1.20, more preferably of at leastabout 1.30, even more preferably of at least about 1.35, and in certaininstances at least about 1.40 or 1.43. In certain example embodiments ofthis invention, good selectivity is achieved without sacrificing SFvalues. In other words, good selectivity values are achieved incombination with rather low SF values. In certain example embodiments ofthis invention, coated articles realize a good selectivity value, incombination with a SF of no greater than 31, and more preferably a SF ofno greater than about 30, even more preferably a SF of no greater thanabout 29, and even more preferably a SF of no greater than about 28.This permits coated articles and/or IG window units, for example, torealize desirable visible transmission while at the same time blockingsignificant undesirable radiation (e.g., IR) from reaching a buildinginterior or the like.

In certain example embodiments of this invention, coated articles havinga single IR reflecting layer are capable of having a reduced glass sidereflectance. In certain example embodiments, before and/or after HT,coated articles such as IG window units according to certain exampleembodiments of this invention have a glass side reflectance (Y) of nomore than about 16%, more preferably about 15% or less, even morepreferably about 14% or less, while maintaining a desirable color.

The terms “heat treatment” and “heat treating” as used herein meanheating the article to a temperature sufficient to achieve thermaltempering, heat bending, and/or heat strengthening of the glassinclusive article. This definition includes, for example, heating acoated article in an oven or furnace at a temperature of least about 580degrees C., more preferably at least about 600 degrees C., for asufficient period to allow tempering, bending, and/or heatstrengthening. In certain instances, the HT may be for at least about 4or 5 minutes. The coated article and/or IG unit may or may not be heattreated in different embodiments of this invention.

FIG. 1 is a side cross sectional view of a coated article according toan example non-limiting embodiment of this invention. The coated articleincludes substrate 1 (e.g., clear, green, bronze, or blue-green glasssubstrate from about 1.0 to 10.0 mm thick, and low-E coating (or layersystem) 30 provided on the substrate 1 either directly or indirectly.The coating (or layer system) 30 includes, for example: bottomdielectric layer 3 which may be silicon nitride (e.g., Si_(x)N_(y)and/or Si₃N₄), silicon oxide and/or silicon oxynitride in differentembodiments of this invention, metallic or substantially metallic colorand/or reflectivity-adjusting absorber layer 4 (e.g., of or includingone or more of Ni, Cr, NiCr, Nb, Zr, NbZr, Si, Ti, Zn, Sn, Cu, Al, V,Mn, Mo, Pd, Ta, W, In, InSn, and/or stainless steel, and/or a mixture(alloy) thereof; the foregoing materials may be partially and/or fullyoxided and/or nitrided), dielectric layer 5 which may be of or includesilicon nitride (e.g., Si_(x)N_(y) and/or Si₃N₄), silicon oxide and/orsilicon oxynitride in different embodiments of this invention (and whichmay be of a substantially similar or the same material and/orcomposition as layer 3 in certain embodiments), lower contact layer 6(which contacts bottom IR reflecting layer 7), conductive and preferablymetallic or substantially metallic infrared (IR) reflecting layer 7,upper contact layer 8, dielectric layer 9, color and/orreflectivity-adjusting absorber layer 10 (e.g., of or including one ormore of Ni, Cr, NiCr, Nb, Zr, NbZr, Si, Ti, Zn, Sn, Cu, Al, V, Mn, Mo,Pd, Ta, W, In, InSn, and/or stainless steel, and/or a mixture (alloy)thereof; the foregoing materials may be partially and/or fully oxidedand/or nitrided), dielectric layer 11, and overcoat layer 12. Likelayers 3 and 5, layers 9 and 11 may be of the same material and/orcomposition in certain example embodiments, so that the dielectriclayers are split by the interposed absorber layer. It is noted that allof the foregoing layers may or may not be included in the low-E coating30 in certain example embodiments. In particular, only one of the colorand/or reflectivity-adjusting absorber layers 4, 10 may be present insome embodiments (e.g., see FIGS. 3( a) and 3(b)), or both may bepresent (e.g., see FIG. 1, FIG. 4( c), and FIG. 5( c)). The “contact”layers 6 and 8 each contact the IR reflecting layer 7 (e.g., layer basedon Ag). The aforesaid layers 3-12 make up low-E (i.e., low emissivity)coating 30 that is provided on glass or plastic substrate 1. Additionallayers may also be provided.

In monolithic instances, the coated article includes only one glasssubstrate 1 as illustrated in FIG. 1. However, monolithic coatedarticles herein may be used in devices such as laminated vehiclewindshields, IG window units, and the like.

FIG. 2 is a cross sectional view of an IG window unit, showing that thecoating 30 may be provided on the interior side of the glass substrate1. However, the invention is not so limited, and it is noted thatcoating 30 may be provided on either glass substrate, preferably on theside of the substrate closest to the gap 17.

As FIG. 2 depicts, an IG window unit may include two spaced apart glasssubstrates 1 and 50. An example IG window unit is illustrated anddescribed, for example, in U.S. Patent Document No. 2004/0005467, thedisclosure of which is hereby incorporated herein by reference. Anexample IG window unit may include, for example, the coated glasssubstrate 40 shown in FIG. 1 (or any of FIGS. 3-5) coupled to anotherglass substrate 50 via spacer(s), sealant(s) or the like (15), with agap 17 being defined therebetween. This gap 17 between the substrates inIG unit embodiments may in certain instances be filled with a gas suchas argon (Ar). An example IG unit may comprise a pair of spaced apartclear glass substrates each about 3-4 mm thick, one of which is coatedwith a low-E coating 30 herein in certain example instances, where thegap between the substrates may be from about 5 to 30 mm, more preferablyfrom about 10 to 20 mm, and most preferably about 16 mm. In certainembodiments, the coating 30 is provided on the interior of the outermost(e.g., closest to the outside) glass substrate 1 as shown in FIG. 2.However, in other embodiments, the coating 30 may be provided on theinterior surface of either substrate facing the gap. An IG unit may alsoinclude additional substrate(s), such as three glass substrates, incertain instances.

FIGS. 3-5 show other example embodiments of this invention, the coatingsof which may be used in connection with FIGS. 1 and/or 2.

It has advantageously been found that including a color and/orreflectivity adjusting absorber layer (4 and/or 10) of varyingthicknesses into the above-mentioned layer stack (e.g., see FIGS. 1-5)in one or more places can result in desirable optical qualities. Morespecifically, in certain example embodiments, by adjusting the thicknessof the color and/or reflectivity adjusting absorber layer(s) 4 and/or10, the glass side coloring of the coated article (the glass side a*_(g)and b*_(g) values) can be tuned so as to appear to be a certain colorwhen the window unit is viewed from the outside. The absorber layer(s) 4and/or 10 may be conductive in certain example instances. Unless statedotherwise, the a*_(g) and b*_(g) values herein refer to glass sidereflective coloration, as viewed from the glass side of a monolithiccoated article or from the side of an IG window unit adapted to face theexterior of the building or structure. Likewise, glass side visiblereflectance (Y) refers to glass side visible reflection, as viewed fromthe glass side of a monolithic coated article or from the side of an IGwindow unit adapted to face the exterior of the building or structure.

More particularly, in certain example embodiments, including absorberlayer 4 between two dielectric layers 3 and 5 can result in a coatedarticle that has desirable optical qualities. In certain exampleembodiments, dielectric layers 3 and 5 comprise the same orsubstantially similar materials/composition. In effect, in certainexample embodiments, a silicon-based layer is split into two layers, 3and 5, and a color and/or reflectivity adjusting absorber layer isprovided between the two dielectric layers. Layers 3 and 5 may bedifferent thicknesses is certain example embodiments. In otherembodiments, layers 3 and 5 may have substantially the same thickness.The thicknesses of layers 3 and 5 can be altered to contribute toachieving a desirable glass side color (e.g., desirable a*_(g) andb*_(g) values). The “desirable” glass side color may be different incertain instances.

In certain example embodiments, the glass-side color of the coatedarticle (a* and b* for the glass side) can be bronze, green, neutral, orblue. Thus, a coating 30 can be applied on a clear glass substrate 1,and the coated article (monolithically, or when measured as an IG unit)will have the appearance of being colored while still having desirablecharacteristics such as those of a traditional low-e coating, such as asheet resistance (R_(s)) of no greater than about 10.0 ohms/square, 9.5ohms/square, or 9.0 ohms/square, more preferably no greater than about5.0 ohms/square, even more preferably no greater than about 4.0ohms/square, and most preferably less than or equal to about 3.5ohms/square before and/or after optional heat treatment such astempering, an emissivity of under about 0.12, 0.11, and/or 0.11, morepreferably under about 0.06, even more preferably under about 0.05, andmost preferably under about 0.04 (e.g., 0.032). The resulting coatedarticle may have a reduced glass side (or building exterior) reflectance(Y) of 16% or less, more preferably about 14% or less (e.g., IG unit) incertain example embodiments, depending in part upon the color desired.

In certain example embodiments, depending in part on the material chosenfor absorber layer(s) 4 and/or 10, and the thicknesses and materials oflayers 3-12, a coating made according to certain example embodiments maybe provided on a clear glass substrate, giving the glass substrate adesired colored (e.g., bronze color) appearance. For example, a coating30 may produce a coated article that, when viewed from the glass side(or building exterior in FIG. 2), in certain example embodiments, has atint that is bronze, neutral, green, royal blue, and/or other colorsmade from combinations thereof.

The absorber layer(s) is/are advantageous because the glass side and/oroutside reflectance is lowered, and desirable visible transmission,color, and low SF can be achieved, without sacrificing sheet resistance.For example, and without limitation, it is often more aestheticallypleasing when a structure such as a building has windows with a lowerglass side reflectance. Architects may thus prefer the glass side (orexterior) visible reflectance to be lower, but may not want to sacrificesheet resistance, color and/or visible transmission to this end. Incertain example embodiments, the thickness of the IR reflecting layer(s)7, which may comprise silver or gold, may be increased. Increasing thethickness of layer 7 can increase the glass side reflectance; thus, ifglass side reflectance is lowered by the inclusion of absorber layer(s)4 and/or 10, but increased by thickening layer 7, the net change inglass side reflectance may be minimal or even zero or substantiallyzero. Increasing the thickness of IR reflecting layer 7 is desirablebecause it enhances the IG unit's ability to block/reflect IR radiation,which would reduce the amount of IR radiation entering a building,structure, vehicle, etc, through the window.

In certain example embodiments, the layers 3-12 are sputtered onto aglass substrate. This may be applicable to any of FIGS. 1-5. Thesputtering target(s) may be planar or rotating cylindrical magnetronsputtering targets (not shown) in example embodiments of this invention.Metal and/or ceramic targets may be used.

Referring to FIGS. 1-5, dielectric layers 3 and 5 may comprise siliconnitride, and in other example embodiments, may comprise silicon oxide,and/or silicon oxynitride. Layers 3 and 5 may be fully or partiallyoxided and/or nitrided. In certain example embodiments, dielectriclayers 3 and 5 may comprise the same or substantially similar materialsand/or composition. In certain embodiments, the thickness of layers 3and 5 may be the same or substantially similar. In other embodiments,one of the layers 3 or 5 may be thicker than the other layer 3 or 5.Layers 3 and 5 may each be from about 70 to 1200 Å thick in certainexample embodiments. In certain example embodiments, only one of layers3 and 5 may be present; however, in other embodiments, both layers 3, 5may be provided.

Layer 4 may be a color and/or reflectivity adjusting absorber layer incertain example embodiments. Absorber layer 4 may be of or include anyone of the following materials, or a mixture (alloy) of any of thematerials: Ni, Cr, NiCr, Nb, Zr, NbZr, Si, Ti, Zn, Sn, Cu, Al, V, Mn,Mo, Pd, Ta, W, In, InSn, and/or stainless steel. The materials canoptionally be partially or fully oxided and/or nitrided. Absorber layer4 may preferably comprise or consist essentially of Ni, Cr, NiCr, Nb,Zr, NbZr, and/or oxides and/or nitrides thereof. Layer 4 may be fromabout 10 to 150 Å thick in certain example embodiments, more preferablyfrom about 20-70 Å thick. However, in other embodiments, layer 4 may bethicker, sometimes significantly, than 150 Å.

Still referring to FIGS. 1-5, contact layers 6 and 8 may comprise Ni,Cr, and/or NiCr, or oxides thereof, in certain example embodiments.Other suitable materials may instead or also be used. Contact layers 6and 8 may be partially or fully oxided and/or partially or fullynitrided in certain example instances. In certain example embodiments,layers 6 and 8 may help protect IR reflecting layer 7 from becomingoxided during deposition of other layers and/or during heat treatment.Contact layers 6 and 8 may each be from about 10 to 150 Å thick incertain example embodiments, more preferably from about 10-60 Å thick.

Continuing to refer to FIGS. 1-5, dielectric layers 9 and 11 maycomprise or consist essentially of silicon nitride, and in other exampleembodiments, may comprise or consist essentially of silicon oxide and/orsilicon oxynitride. Layers 9 and 11 may be fully or partially oxidedand/or nitrided. In certain example embodiments, dielectric layers 9 and11 may comprise the same or substantially similar materials and/orcomposition. It is noted that all silicon nitride, silicon oxynitride,and/or silicon oxide layers herein (e.g., see 3, 5, 9, and/or 11) mayoptionally be doped with aluminum (e.g., 1-5%), stainless steel, or thelike. In certain embodiments, the thickness of dielectric layers 9 and11 may be the same or substantially similar. Layers 9 and 11 may each befrom about 70 to 1200 Å in certain example embodiments. In certainexample embodiments, only one of layers 9 and 11 may be present;however, in other embodiments, both layers may be provided.

Layer 10 may be a color and/or reflectivity adjusting absorber layer incertain example embodiments (e.g., see FIGS. 1-5). With respect toabsorber layers 4, 10, a layer stack may comprise layers 4 and 10, layer4 only, or layer 10 only. Layer 10 may be of or include any one of thefollowing materials, or a mixture (alloy) of any of these materials: Ni,Cr, NiCr, Nb, Zr, NbZr, Si, Ti, Zn, Sn, Cu, Al, V, Mn, Mo, Pd, Ta, W,In, InSn, and/or stainless steel. The materials can be partially orfully oxided and/or nitrided. Layer 10 may preferably comprise orconsist essentially of Ni, Cr, NiCr, Nb, Zr, NbZr, and/or oxides and/ornitrides thereof. Absorber layer 10 may be from about 10 to 150 Å thickin certain example embodiments. However, in other embodiments, absorberlayer 10 may be thicker than 150 Å. Layer 10 may not be included incertain embodiments, or may be included instead of layer 4, or bothlayers may be present.

Layer 12 is an optional overcoat. Layer 12 may be provided over the IRreflecting layer 7 and over dielectric layer(s) 9, 11. Layer 12 maycomprise an oxide, nitride, and/or oxynitride of zirconium and/oraluminum (e.g., ZrO_(x), ZrO_(x)N_(y) and/or AlO_(x)N_(y)) in certainexample embodiments of this invention.

The coated article made according to the above embodiments (e.g., seeFIGS. 1-5) may be used in an IG unit (e.g., see FIG. 2). The IG unit mayor may not be a vacuum IG unit. In other example embodiments, the coatedarticle may be used as a monolithic window unit.

A coated article and/or IG unit made according to the above embodimentsis advantageous in that it may lower the glass side reflectance due toabsorbing properties of the color and/or reflectivity adjusting absorberlayer(s). In certain example embodiments, it may be possible to achievea better selectivity at a given glass side reflectance by increasing thethickness of the IR reflecting (e.g., silver-based) layer 7. A coatedarticle and/or IG unit made according to certain example embodiments ofthis invention may also have improved thermal, mechanical, and chemicaldurability as compared to split-silver reflective coatings.

Coated articles with a neutral, green, blue, bronze, gold, etc. glassside reflectance colors are possible to achieve. It has been found thatcoated articles and/or IG units made according to certain exampleembodiments of this invention may have the lower glass side (orexterior) reflectance of a “split silver” (or double silver) coatingwith the color variety of a coated article containing a single IRreflecting layer.

In certain example embodiments, the desired glass side reflectance andtransmission color can be combined to a desirable film side reflectancecolor, including a lower film side reflectance. The inclusion of layers4 and/or 10 in a low-E layer stack allows the color, reflectivity, andsolar performance of the coated article to be balanced and tuned.

Coated articles made according to the embodiments herein areadvantageous in that clear glass 1 can be provided with a coating 30that provides the appearance of a body-tinted glass—but the glasssubstrate 1 may in fact be clear or substantially clear in color byitself. By reducing the glass side/outside reflectance with a colorand/or reflectivity-adjusting absorber layer (4 and/or 10), a thicker IRreflecting layer 7 is possible. Normally a thicker IR reflecting layerincreases the glass side reflectance, but the absorber layer(s) allowsthe thicker IR reflecting layer 7 without a significant increase inglass side reflectance.

Example embodiments with bronze color (e.g., glass side reflectivecolor) are described above—see FIGS. 1-5. This section is in addition tothe above with respect to bronze colored embodiments. A bronze-tintedcoated article may have a visible transmission of from about 10 to 55%,more preferably from about 20 to 50%, and most preferably, from about 30to 48%. An IG unit including a bronze-tinted coated article may evenhave a visible transmission of no greater than about 43%. When thedesired tint of a coated article and/or IG unit is bronze, layers 4and/or 10 may comprise or consist essentially of Ni and/or Cr. However,a nitride and/or oxynitride of nickel chromium may be used for layers 4and/or 10 as well. Nb, Zr, and/or NbZr may also be used in certainexample embodiments for absorber layer 4 and/or 10. An oxide and/oroxynitride of Nb, Zr, and/or NbZr may also be used. In a bronze-tintedcoated article and/or IG unit, in certain example embodiments, layer 10may not be present. In different example embodiments, layer 10 may bepresent while layer 4 is not. In other embodiments, however, layers 4and/or 10 may both be included in the coating. Layers 4 and/or 10 may befully or partially nitrided and/or oxided. Layers 4 and/or 10 in certainembodiments of a bronze-tinted coated article and/or IG unit may be fromabout 10 to 150 Å, more preferably from about 25 to 75 Å, and mostpreferably from about 30 to 70 Å. In a bronze-tinted coated articleand/or IG unit, dielectric layers 3 and/or 5 may comprise siliconnitride and/or silicon oxynitride in certain embodiments. Layer 3 may befrom about 70 to 1200 Å, more preferably from about 80 to 200 Å, andmost preferably from about 120 to 160 Å. Layer 5 may be from about 70 to1200 Å, more preferably from about 200 to 440 Å, and most preferablyfrom about 260 to 380 Å. However, in certain example embodiments, layers3 and 5 may have a similar or substantially the same thickness. Layers 6and/or 8 in certain example embodiments of a bronze-tinted coatedarticle and/or IG unit may comprise an oxide, nitride, and/or oxynitrideof nickel chromium. In some embodiments, layers 6 and 8 may be of asimilar thickness. However, the invention is not so limited. An examplethickness for layers 6 and 8 is from about 10 to 150 Å, more preferablyfrom about 15 to 75 Å, and most preferably from about 20 to 60 Å. IRreflecting layer 7 may comprise silver and/or gold in certain exampleembodiments. The thickness of layer 7 may be from about 100 to 170 Å,more preferably from about 110 to 160 Å, and most preferably from 115 to155 Å.

Layers 9, 10, and/or 11 are optional in certain embodiments. In certainexample embodiments, there may only be one of layers 9 and 11, and layer10 may not be included. Other embodiments may have all three of layers9, 10, and 11. In different embodiments, layers 9, 10 and/or 11 may bepresent, and layers 3, 4 and/or 5 may not be.

When layers 10 and 11 are not included, in certain embodiments, layer 9may be from about 70 to 1200 Å, more preferably from about 100 to about900 Å, and most preferably, from about 300 to 700 Å. When layers 10 and11 are included, layers 9 and/or 11 may be from about 70 to 1200 Å. Incertain example embodiments of a bronze-tinted coated article and/or IGunit, layers 10 and 11 may not be included in the coating.

Layer 12 may be provided over the outermost layer in certain exampleembodiments. Layer 12 may enhance mechanical and/or chemical durabilityof a coated article made according to example embodiments. Layer 12 maycomprise an oxide, nitride, and/or oxynitride of aluminum and/orzirconium. Layer 12 may be partially and/or fully oxided or nitrided.Layer 12 may be from about 10 to 60 Angstroms in certain embodiments.This thickness is not limiting, however, and layer 12 may be thicker orthinner in other embodiments.

Example materials and thicknesses for layers, for FIG. 3( a) embodimentssuch as bronze colored embodiments, are set forth below in Table 1.

TABLE 1 Example Materials/Thicknesses; FIG. 3(a) Embodiment LayerPreferred Range Most Preferred Example Glass (1-10 mm thick) ({acuteover (Å)}) ({acute over (Å)}) (Å) Si_(x)N_(y) (layer 3) 70-1200 Å120-160 Å 140 Å NiCrN_(x) (layer 4) 10-150 Å 30-70 Å 50 Å Si_(x)N_(y)(layer 5) 70-1200 Å 260-380 Å 320 Å NiCr (layer 6) 10-150 {acute over(Å)} 20-50 {acute over (Å)} 30 Å Ag (layer 7) 100-170 {acute over (Å)}115-155 {acute over (Å)} 130 Å NiCr (layer 8) 10-150 {acute over (Å)}20-50 {acute over (Å)} 30 Å Si_(x)N_(y) (layer 9) 70 to 1200 Å 300-700 Å480 Å

In certain example embodiments of this invention, coated articles hereinmay have the following optical and solar characteristics set forth inTable 2 when measured monolithically (before or after any optional HT).

TABLE 2 Optical/Solar Characteristics (Monolithic) CharacteristicGeneral More Preferred Most Preferred R_(s) (ohms/sq.): <=5.0 <=4.0<=3.5 E_(n): <=0.06 <=0.05 <=0.04 T_(vis) (Ill. C. 2°): <=55% <=50%<=48%

Moreover, in certain example laminated embodiments of this invention,coated articles herein which have been optionally heat treated to anextent sufficient for tempering, and which have been coupled to anotherglass substrate to form an IG unit, may have the following IG unitoptical/solar characteristics.

TABLE 3 Example Optical Features (Monolithic pre or post-HT)Characteristic General More Preferred T_(vis) (or TY)(Ill. C. 2°): <=50%<=48% R_(g)Y (Ill. C., 2 deg.): 5 to 20% 9 to 13% a*_(g) (Ill.C., 2°):0.0 to 3.0 1.0 to 2.5 b*_(g) (Ill. C., 2°): 0.0 to 3.0 1.0 to 2.5 L*(Ill. C. 2°): 26-52 36-43

TABLE 4 Example Optical Features (IG Unit pre or post-HT) CharacteristicGeneral More Preferred T_(vis) (or TY)(Ill. C. 2°): <=50% <=45% a*_(t)(Ill. C. 2°): −8.0 to 0.0 −6.0 to −2.0 b*_(t) (Ill. C. 2°): 0.0 to 7.01.0 to 5.0 L* (Ill. C. 2°): <=77 <=75 R_(f)Y (Ill. C., 2 deg.): 10 to30% 15 to 25% a*_(f) (Ill. C., 2°): 0.0 to 15.0 2.0 to 13.0 b*_(f) (Ill.C., 2°): −20.0 to −5.0 −15.0 to −7.0 L* (Ill. C. 2°): 37-62 45-58 R_(g)Y(Ill. C., 2 deg.): 10 to 16% 11 to 15% a*_(g) (Ill. C., 2°): −1.0 to 4.00.0 to 3.0 b*_(g) (Ill. C., 2°): 0.0 to 4.0 0.0 to 3.0 L* (Ill. C. 2°):37-47 39-46

In certain example embodiments, an example layer stack such as in Table1 may make it possible to reduce glass-side reflectance by about 50% (ascompared to a coating that does not include an absorber layer(s)). Theglass side reflectance may also appear less reddish.

Monolithically, a bronze-tinted coated article made according to theabove embodiments may have a glass side reflectance Y of from about 5 to20%, more preferably from about 9 to 15%, and most preferably from about10 to 13% in certain example embodiments. These results are for amonolithic coated article.

In certain example embodiments, a bronze-tinted coated article(monolithically) may have an a*_(g) value of from about 0.0 to 3.0, morepreferably from about 1.0 to 2.5, and most preferably from about 1.5 to2.5. In certain example embodiments, a bronze-tinted coated article mayhave a b*_(g) value of from about 0.0 to 3.0, more preferably from about1.0 to 2.5, and most preferably from about 1.5 to 2.5 (measuredmonolithically). In certain example embodiments, when measuredmonolithically, a bronze-tinted coated article may have a L*_(g) valueof from about 34 to 47, more preferably from about 36 to 43, and mostpreferably from about 37 to 42.

In certain example embodiments, a bronze-tinted coated article (IG unit)may have an a*_(g) value of from about −1.0 to 4.0, more preferably fromabout 0.0 to 3.0, and most preferably from about 1.0 to 2.5. In certainexample embodiments, a bronze-tinted coated article may have a b*_(g)value of from about 0.0 to 4.0, more preferably from about 0.0 to 3.0,and most preferably from about 1.0 to 2.5. In certain exampleembodiments, a bronze-tinted coated article may have a L*_(g) value offrom about 37 to 47, more preferably from about 39 to 46, and mostpreferably from about 40 to 45.

In certain example embodiments, a bronze-tinted coated article may havea sheet resistance (R_(s)) of less than or equal to about 5.0 (morepreferably less than or equal to about 4.0, most preferably less than orequal to about 3.5, and sometimes even less than or equal to about 3.0)before and/or after heat treatment. In certain example embodiments ofthis invention, a bronze-tinted coated article after heat treatment mayhave an emissivity of less than or equal to about 0.06, more preferablyless than or equal to about 0.05, and most preferably less than or equalto about 0.04 (e.g., 0.037).

The selectivity of a bronze-tinted IG window unit/coated article may beat least about 1.20, more preferably at least about 1.30, even morepreferably at least about 1.35 or 1.40, and even sometimes about 1.43.The Solar Factor (SF) may be from about 28 to 32.

The visible transmission of a bronze-tinted coated article (IG unit) maybe from about 10 to 55%, more preferably from about 20 to 50%, and mostpreferably from about 30 to 45%. In certain example embodiments, thevisible transmission may be no greater than 50%, and more preferably, nogreater than 40%. In other example embodiments, the visible transmissionof a bronze-tinted coated article in an IG unit may be from about 30 to40%.

Example embodiments with green color (e.g., glass side reflective color)are described above—see FIGS. 1-5. This section is in addition to theabove with respect to green colored embodiments.

A coated article comprising a green-tinted coated article may have avisible transmission of from about 10 to 55%, more preferably from about20 to 50%, and most preferably, from about 30 to 48%. When the desiredtint of a coated article and/or IG unit is green, layer 4 may compriseor consist essentially of Ni and/or Cr. However a nitride and/oxynitrideof nickel chromium may be used for layers 4 and/or 10 as well. Nb, Zr,and/or NbZr may also be used in certain example embodiments for absorberlayer 4 and/or 10. An oxide and/or oxynitride of Zb, Zr, and/or ZbZr mayalso be used. In a green-tinted coated article and/or IG unit, incertain example embodiments, layer 10 may not be present. In differentexample embodiments, layer 10 may be present while layer 4 is not. Inother embodiments, however, layers 4 and/or 10 may both be included inthe coating. Layers 4 and/or 10 may be fully or partially nitridedand/or oxided.

Layers 4 and/or 10 in certain embodiments of a green-tinted coatedarticle and/or IG unit may be from about 10 to 150 Å, more preferablyfrom about 25 to 75 Å, and most preferably from about 30 to 70 Å.

In a green-tinted coated article and/or IG unit, dielectric layers 3and/or 5 may comprise silicon nitride and/or silicon oxynitride incertain embodiments. Layer 3 may be from about 70 to 1200 Å, morepreferably from about 80 to 400 Å, and most preferably from about 160 to400 Å. Layer 5 may be from about 70 to 1200 Å, more preferably fromabout 500 to 1200, and most preferably from about 890 to 1150 Å.

Layers 6 and/or 8 in certain example embodiments of a green-tintedcoated article and/or IG unit may comprise an oxide, nitride, and/oroxynitride of nickel chromium. In some embodiments, layers 6 and 8 maybe of a similar thickness. However, the invention is not so limited. Anexample thickness for layers 6 and 8 is from about 10 to 150 Å, morepreferably from about 20 to 80 Å, and most preferably from about 25 to75 Å.

In a green-tinted coated article and/or IG unit, IR reflecting layer 7may comprise silver and/or gold in certain example embodiments. Thethickness of layer 7 may be from about 100 to 170 Å, more preferablyfrom about 110 to 160 Å, and most preferably from 115 to 155 Å.

Layers 9, 10, and/or 11 are optional in certain embodiments. In certainexample embodiments, there may only be one of layers 9 and 11, and layer10 may not be included. Other embodiments may have all three of layers9, 10, and 11. In different embodiments, layers 9, 10 and/or 11 may bepresent, and layers 3, 4 and/or 5 may not be.

When layers 10 and 11 are not included, in certain embodiments, layer 9may be from about 70 to 1200 Å, more preferably from about 100 to about900 Å, and most preferably, from about 300 to 700 Å. When layers 10 and11 are included, layers 9 and/or 11 may be from about 70 to 1200 Å. Incertain example embodiments of a green-tinted coated article and/or IGunit, layers 10 and 11 may not be included in the coating.

Layer 12 may be provided over the outermost layer in certain exampleembodiments. Layer 12 may enhance mechanical and/or chemical durabilityof a coated article made according to example embodiments. Layer 12 maycomprise an oxide, nitride, or oxynitride of zirconium or aluminum.Layer 12 may be partially and/or fully oxided or nitrided.

Example materials and thickness for layers for FIG. 3( a) embodimentssuch as green-colored embodiments are set forth below in Table 5.

TABLE 5 Example Materials/Thicknesses; FIG. 3(a) Embodiment LayerPreferred Range Most Preferred Example Glass (1-10 mm thick) ({acuteover (Å)}) ({acute over (Å)}) (Å) Si_(x)N_(y) (layer 3) 70-1200 Å160-400 Å 280 Å NiCrN_(x) (layer 4) 10-150 Å 30-70 Å 50 Å Si_(x)N_(y)(layer 5) 70-1200 Å 890-1150 Å 1020 Å NiCr (layer 6) 10-150 Å 25-75{acute over (Å)} 40 Å Ag (layer 7) 100-170 {acute over (Å)} 115-155{acute over (Å)} 130 Å NiCr (layer 8) 10-150 {acute over (Å)} 25-75{acute over (Å)} 40 Å Si_(x)N_(y) (layer 9) 70 to 1200 Å 300-700 Å 510 Å

In certain example embodiments of this invention, coated articles hereinmay have the following optical and solar characteristics set forth inTable 6 when measured monolithically (before or after any optional HT).

TABLE 6 Optical/Solar Characteristics (Monolithic) CharacteristicGeneral More Preferred Most Preferred R_(s) (ohms/sq.): <=6.0 <=5.0<=4.0 E_(n): <=0.12 <=0.06 <=0.05 T_(vis) (Ill. C. 2°): <=55% <=50%<=48%

Moreover, in certain example laminated embodiments of this invention,coated articles herein which have been optionally heat treated to anextent sufficient for tempering, and which have been coupled to anotherglass substrate to form an IG unit, may have the following IG unitoptical/solar characteristics.

TABLE 7 Example Optical Features (Monolithic pre or post-HT)Characteristic General Most Preferred T_(vis) (or TY)(Ill. C. 2°): <=55%<=48% R_(g)Y (Ill. C., 2 deg.): 26 to 42% 30 to 36% a*_(g) (Ill. C.,2°): −15.0 to −5.0 −12.0 to −7.0 b*_(g) (Ill. C., 2°): −6.0 to 3.0 −3.0to 1.0 L* (Ill. C. 2°): 58-71 62-67

TABLE 8 Example Optical Features (IG Unit pre or post-HT) CharacteristicGeneral Most Preferred T_(vis) (or TY)(Ill. C. 2°): <=50% <=45% a*_(t)(Ill. C. 2°): −8.0 to 2.0 −6.0 to 1.0 b*_(t) (Ill. C. 2°): −5.0 to 5.0−4.0 to 4.0 L* (Ill. C. 2°): <=77 <=73 R_(f)Y (Ill. C., 2 deg.): 10 to30% 12 to 26% a*_(f) (Ill. C., 2°): 0 to 10.0 2.0 to 8.0 b*_(f) (Ill.C., 2°): −18.0 to 0.0 −15.0 to −3.0 L* (Ill. C. 2°): 37-62 41-58 R_(g)Y(Ill. C., 2 deg.): 26 to 44% 32 to 38% a*_(g) (Ill. C., 2°): −15.0 to−5.0 −12.0 to −7.0 b*_(g) (Ill. C., 2°): −6.0 to 3.0 −3.0 to 2.0 L*(Ill. C. 2°): 58-73 63-68

In certain example embodiments, it may be possible to reduce glass-sidereflectance with a coating containing an absorber layer. The glass sidecolor of the coated article and/or IG unit may be a more “intense”green. The solar factor (g value) of a green-tinted coated articleand/or IG unit may also be reduced as compared to a layer stack havingthe same Ag-inclusive layer (layer 7) thickness but no color and/orreflectivity-adjusting absorber layer (layers 4 and/or 10).

A green-tinted coated article made according to the above embodimentsmay have a glass side reflectance Y of from about 26 to 42%, morepreferably from about 28-40%, and most preferably from about 30 to 36%in certain example embodiments, when measured monolithically. In certainexample embodiments, a green-tinted coated article (IG unit) may have anoutside glass reflectance of about 26 to 44%, more preferably from about30-40%, and most preferably frdm about 32-38%.

In certain example embodiments, a green-colored coated article(monolithically) may have an a*_(g) value of from about −15 to −5, morepreferably from about −13 to −6, and most preferably from about −12 to−7. In certain example embodiments, a green-tinted coated article(monolithically) may have a b*_(g) value of from about −6 to 3, morepreferably from about −4 to 2, and most preferably from about −3 to 1.An IG unit according to this embodiment may have an a*_(g) value of fromabout −15 to −5, more preferably from about −13 to −6, and mostpreferably from about −12 to −7. In certain example embodiments, agreen-tinted coated article (IG unit) may have a b*_(g) value of fromabout −6 to 3, more preferably from about −4 to 2, and most preferablyfrom about −3 to 2

In certain example embodiments, a green-tinted coated article (IG unit)may have a L*_(g) value of from about 58 to 73, more preferably fromabout 60 to 70, and most preferably from about 63 to 68.

The sheet resistance may be no greater than about 6.0 ohms/square, morepreferably no greater than about 5.0 ohms/square, and most preferably nogreater than about 4.0 ohms/square. The sheet resistance may be evenlower in certain embodiments. The emissivity may be no greater thanabout 0.06, more preferably no greater than about 0.05, and mostpreferably no greater than about 0.04.

The visible transmission for a green-tinted coated article, particularlyfor an IG unit, may be from about 30-45% in certain example embodiments.The Solar Factor may be from about 26 to 32 for an IG unit according tocertain example embodiments. Thus, the selectivity for a green-tintedcoated article may be at least about 1.2, more preferably at least about1.3, even more preferably 1.35, and most preferably at least about 1.40or 1.43.

Example embodiments with neutral color (e.g. glass side reflectivecolor) are described above with respect to FIGS. 1-5. This section is inaddition to the above with respect to neutral-colored embodiments. An IGunit comprising a neutral-tinted coated article may have a visibletransmission of from about 10 to 55%, more preferably from about 20 to50%, and most preferably, from about 30 to 48%. When the desired tint ofa coated article and/or IG unit is neutral, layers 4 and/or 10 maycomprise or consist essentially of Ni and/or Cr. However, a nitrideand/or oxynitride of nickel chromium may be used for layers 4 and/or 10as well. Layers 4 and/or 10 may also comprise or consist essentially ofan oxide, nitride, or oxynitride of Zb, Zr, and/or ZbZr. In aneutral-tinted coated article and/or IG unit, in certain exampleembodiments, layer 10 may not be present. In different exampleembodiments, layer 10 may be present while layer 4 is not. In otherembodiments, however, layers 4 and/or 10 may both be included in thecoating. Layers 4 and/or 10 may be fully or partially nitrided and/oroxided.

Layers 4 and/or 10 in certain embodiments of a neutral-tinted coatedarticle and/or IG unit may be from about 10 to 150 Å, more preferablyfrom about 15 to 75 Å, and most preferably from about 20 to 50 Å. Inother embodiments, layer(s) 4 and/or 10 may be from about 10 to 40 Å inthickness.

In a neutral-tinted coated article and/or IG unit, dielectric layers 3and/or 5 may comprise silicon nitride and/or silicon oxynitride incertain embodiments. Layer 3 may be from about 70 to 1200 Å, morepreferably from about 75 to 200 Å, and most preferably from about 80 to120 Å. In other embodiments, layer 3 may be from about 180 to 300 Å. Incertain example embodiments of a neutral-tinted coated article and/or IGunit, layer 5 may be from about 20 to 1200 Å, more preferably from about25 to 75 Å, and most preferably from about 40 to 60 Å. In otherembodiments, layer 5 may be from about 100 to 280 Å.

Layers 6 and/or 8 in certain example embodiments of a neutral-tintedcoated article and/or IG unit may comprise nickel chromium, and/or anoxide, nitride, and/or oxynitride of nickel chromium. In someembodiments, layers 6 and 8 may be of a similar thickness. However, theinvention is not so limited. An example thickness for layers 6 and 8 isfrom about 1 to 150 Å, more preferably from about 5 to 50 Å, and mostpreferably from about 10 to 30 Å. In other example embodiments, layers 6and/or 8 may be from about 10 to 50 Å in thickness.

Layer 7 may comprise silver and/or gold in certain example embodiments.The thickness of layer 7 may be from about 100 to 250 Å, more preferablyfrom about 110 to 220 Å, and most preferably from 160 to 200 Å. Thisthicker silver-inclusive layer 7 may advantageously reduce IR radiation,and may reduce visible transmission if so desired. In other exampleembodiments, layer 7 may be from about 115 to 155 Å in thickness.

Layers 9, 10, and/or 11 are optional in certain embodiments. In certainexample embodiments, there may only be one of layers 9 and 11, and layer10 may not be included. Other embodiments may have all three of layers9, 10, and 11. In different embodiments, layers 9, 10 and/or 11 may bepresent, and layers 3, 4 and/or 5 may not be.

When layers 10 and 11 are not included, in certain embodiments, layer 9may be from about 70 to 1200 Å, more preferably from about 100 to about900 Å, and most preferably, from about 300 to 700 Å. When layers 10 and11 are included, layers 9 and/or 11 may be from about 70 to 1200 Å. Incertain example embodiments of a neutral-tinted coated article and/or IGunit, layers 10 and 11 may not be included in the coating. In otherembodiments, layers 9, 10 and/or 11 may be present, and layers 3, 4and/or 5 (particularly layers 4 and/or 5) may not be present.

Layer 12 may be provided over the outermost layer in certain exampleembodiments. Layer 12 may enhance mechanical and/or durability of acoated article made according to example embodiments. Layer 12 maycomprise an oxide, nitride, or oxynitride of zirconium or aluminum.Layer 12 may be partially and/or fully oxided and/or nitrided. Incertain example embodiments, layer 12 may be from about 10 to 80 Åthick, more preferable, from about 20 to 70 Å, and most preferably, fromabout 30 to 50 Å in thickness. In other embodiments, layer 12 may befrom about 10 to 60 Angstroms in thickness.

In certain example embodiments, a neutral-tinted coated article and/orIG unit containing at least one color and/or reflectivity-adjustingabsorber layer may have a reduced transmission, which is desirable incertain applications, and reduced glass side reflectance, and/orincreased IR ray blockage. In certain example embodiments, a reducedvisible transmission may be desirable. The reflected glass side colormay also be improved.

Example materials and thickness for layers for FIG. 3( a) embodimentssuch as neutral-colored embodiments are set forth below in Table 9.

TABLE 9 Example Materials/Thicknesses; FIG. 3(a) Embodiment Layer MorePreferred Most Preferred Example Glass (1-10 mm thick) Range ({acuteover (Å)}) ({acute over (Å)}) (Å) Si_(x)N_(y) (layer 3) 70-1200 Å180-300 Å 240 Å NiCrN_(x) (layer 4) 10-150 Å 10-30 Å 10 Å Si_(x)N_(y)(layer 5) 70-1200 Å 100-280 Å 190 Å NiCr (layer 6) 10-150 Å 10-50 {acuteover (Å)} 25 Å Ag (layer 7) 100-170 {acute over (Å)} 115-155 {acute over(Å)} 150 Å NiCr (layer 8) 10-150 {acute over (Å)} 10-50 {acute over (Å)}25 Å Si_(x)N_(y) (layer 9) 70 to 1200 Å 300-700 Å 580 Å

In certain example embodiments of this invention, coated articles hereinmay have the following optical and solar characteristics set forth inTable 10 when measured monolithically (before or after any optional HT).

TABLE 10 Optical/Solar Characteristics for Neutral (Monolithic)Characteristic General More Preferred Most Preferred R_(s) (ohms/sq.):<=5.0 <=4.0 <=3.5 E_(n): <=0.12 <=0.05 <=0.04 T_(vis) (Ill. C. 2°):<=55% <=50% <=48%

Moreover, in certain example laminated embodiments of this invention,coated articles herein which have been optionally heat treated to anextent sufficient for tempering, and which have been coupled to anotherglass substrate to form an IG unit, may have the following IG unitoptical/solar characteristics.

TABLE 11 Example Optical Features for Neutral (Monolithic pre orpost-HT) Characteristic General Most Preferred T_(vis) (or TY)(Ill. C.2°): <=55% <=48% R_(g)Y (Ill. C., 2 deg.): 11 to 33% 18 to 25% a*_(g)(Ill. C., 2°): −5.0 to 1.0 −3.0 to 0.0 b*_(g) (Ill. C., 2°): −5.0 to 1.0−4.0 to 0.0 L* (Ill. C. 2°): 39-64 49-58

TABLE 12 Example Optical Features (IG Unit pre or post-HT)Characteristic General Most Preferred T_(vis) (or TY)(Ill. C. 2°): <=50%<=45% L* (Ill. C. 2°): <=77 <=73 R_(f)Y (Ill. C., 2 deg.): 15 to 27% 18to 25% L* (Ill. C. 2°): 45-59 49-58 R_(g)Y (Ill. C., 2 deg.): 11 to 35%19 to 27% a*_(g) (Ill. C., 2°): −5.0 to 1.0 −3.0 to 0.0 b*_(g) (Ill. C.,2°): −5.0 to 1.0 −4.0 to 0.0 L*_(g) (Ill. C. 2°): 39-66 50-59

Monolithically, a neutral-tinted coated article may have a visibletransmission of from about 40 to 48%.

A neutral-tinted coated article made according to the above embodimentsmay have a glass side reflectance Y of from about 11 to 33%, morepreferably from about 15-28%, and most preferably from about 18 to 25%in certain example embodiments. These values are for a monolithic coatedarticle. An IG unit with a neutral-tinted coated article may have anoutside reflectance Y of from about 11 to 35%, more preferably fromabout 16 to 30%, and most preferably from about 19 to 27%.

In certain example embodiments, monolithically, a neutral-tinted coatedarticle may have an a*_(g) value of from about −5 to 1, more preferablyfrom about −4 to 1, and most preferably from about −3 to 0. In certainexample embodiments, monolithically, a neutral-tinted coated article mayhave a b*_(g) value of from about −5 to 1, more preferably from about−4.5 to 1, and most preferably from about −4 to −0. In certain exampleembodiments, monolithically, a neutral-tinted coated article may have aL*_(g) value of from about 39 to 64, more preferably from about 45 to62, and most preferably from about 49 to 58.

An IG unit with a neutral-tinted coated article may have an a*_(g) valueof from about −5 to 1, more preferably from about −4 to 1, and mostpreferably from about −3 to 0. The neutral-tinted IG unit may have ab*_(g) value of from about −5 to 1, more preferably from about −4.5 to1, and most preferably from about −4 to 0.

The sheet resistance of a neutral-tinted coated article may be nogreater than about 5.0 ohms/square, more preferably no greater thanabout 4.0 ohms/square, and most preferably no greater than about 3.5ohms/square. The visible transmission of a neutral-tinted IG unit ispreferably from about 30 to 45%, and the Solar Factor is from about 28to 32. Therefore, selectivity is preferably at least (or greater than)about 1.2, more preferably at least (or greater than) about 1.3, andmost preferably at least (or greater than)about 1.40 or about 1.43.

The emissivity of a neutral tinted coated article may be no greater thanor equal to about 0.06, more preferably no greater than or equal to0.05, and most preferably no greater than or equal to 0.04.

Example embodiments with blue color (e.g., glass side reflective color)are described above—see FIGS. 1-5. This section is in addition to theforegoing with respect to blue-colored embodiments. A coated articlecomprising a blue-tinted coated article may have a visible transmissionof from about 10 to 55%, more preferably from about 20 to 50%, and mostpreferably, from about 30 to 48%. When the desired tint of a coatedarticle and/or IG unit is blue, layers 4 and/or 10 may comprise orconsist essentially of Ni and/or Cr. However, a nitride and/oroxynitride of nickel chromium may be used for layers 4 and/or 10 aswell. An oxide and/or oxynitride of Nb, Zr, and.or NbZr may also be usedin certain example embodiments for absorber layers 4 and/or 10. In ablue-tinted coated article and/or IG unit, in certain exampleembodiments, layer 10 may not be present. In different exampleembodiments, layer 10 may be present while layer 4 is not. In otherembodiments, however, layers 4 and/or 10 may both be included in thecoating. Layers 4 and/or 10 may be fully or partially nitrided and/oroxided.

Layers 4 and/or 10 in certain embodiments of a blue-tinted coatedarticle and/or IG unit may be from about 10 to 150 Å, more preferablyfrom about 10 to 50 Å, and most preferably from about 10 to 40 Å. Layers4 and/or 10 may be even thinner in certain example embodiments.

In a blue-tinted coated article and/or IG unit, dielectric layers 3and/or 5 may comprise silicon nitride and/or silicon oxynitride incertain embodiments. Layer 3 may be from about 70 to 1200 Å, morepreferably from about 100 to 400 Å, and most preferably from about 150to 350 Å. In certain example embodiments of a blue-tinted coated articleand/or IG unit, layer 5 may be from about 20 to 1200 Å, more preferablyfrom about 200 to 1200 Å, and most preferably from about 500 to 900 Å.

Layers 6 and/or 8 in certain example embodiments of a blue-tinted coatedarticle and/or IG unit may comprise nickel chromium, and/or an oxide,nitride, and/or oxynitride of nickel chromium. In some embodiments,layers 6 and 8 may be of a similar thickness. However, the invention isnot so limited. An example thickness for layers 6 and 8 is from about 10to 150 Å, more preferably from about 10 to 50 Å, and most preferablyfrom about 10 to 40 Å. Layers 6 and/or 8 may be even thinner than 10 Åin some embodiments.

Layer 7 may comprise silver and/or gold in certain example embodiments.The thickness of layer 7 may be from about 100 to 170 Å, more preferablyfrom about 110 to 160 Å, and most preferably from 120 to 140 Å.

Layers 9, 10, and/or 11 are optional in certain embodiments. In certainexample embodiments, there may only be one of layers 9 and 11, and layer10 may not be included. Other embodiments may have all three of layers9, 10, and 11. In different embodiments, layers 9, 10 and/or 11 may bepresent, and layers 3, 4 and/or 5 may not be.

When layers 10 and 11 are not included, in certain embodiments, layer 9may be from about 70 to 1200 Å, more preferably from about 100 to about900 Å, and most preferably, from about 300 to 700 Å. When layers 10 and11 are included, layers 9 and/or 11 may be from about 70 to 1200 Å. Incertain example embodiments of a blue-tinted coated article and/or IGunit, layers 10 and 11 may not be included in the coating. In otherembodiments, layers 9, 10 and/or 11 may be present, and layers 3, 4and/or 5 (particularly layers 4 and/or 5) may not be present.

Layer 12 may be provided over the outermost layer in certain exampleembodiments. Layer 12 may enhance mechanical and/or durability of acoated article made according to example embodiments. Layer 12 maycomprise an oxide, nitride, or oxynitride of zirconium or aluminum.Layer 12 may be partially and/or fully oxided or nitrided. In certainexample embodiments, layer 12 may be from about 10 to 80 Å thick, morepreferably, from about 20 to 70 Å, and most preferably, from about 30 to50 Å in thickness.

In certain example embodiments, a blue-tinted coated article and/or IGunit containing at least one color and/or reflectivity-adjustingabsorber layer may have a reduced transmission, which is desirable incertain applications, and reduced glass side reflectance. The reflectedglass side color may also be improved.

By adjusting the thickness of layers 3-12, the glass side reflectanceand color of certain example embodiments of this invention may beoptimized. Visible transmission, in certain embodiments, may bedesirably reduced. In these or other embodiments, the solar factorand/or reflectivity may also be improved.

Example materials and thicknesses for layers for FIG. 3( a) embodimentssuch as blue colored embodiments are set forth below in Table 13

TABLE 13 Example Materials/Thicknesses; FIG. 3(a) Embodiment Layer MorePreferred Most Preferred Example Glass (1-10 mm thick) Range ({acuteover (Å)}) ({acute over (Å)}) (Å) Si_(x)N_(y) (layer 3) 70-1200 Å150-350 Å 270 Å NiCrN_(x) (layer 4) 10-150 Å 10-40 Å 12 Å Si_(x)N_(y)(layer 5) 70-1200 Å 500-900 Å 700 Å NiCr (layer 6) 10-150 Å 10-40 {acuteover (Å)} 25 Å Ag (layer 7) 100-170 {acute over (Å)} 120-140 {acute over(Å)} 130 Å NiCr (layer 8) 10-150 {acute over (Å)} 10-40 {acute over (Å)}25 Å Si_(x)N_(y) (layer 9) 70 to 1200 Å 300-700 Å 430 Å

In certain example embodiments of this invention, coated articles hereinmay have the following optical and solar characteristics set forth inTable 10 when measured monolithically (before or after any optional HT).

TABLE 14 Optical/Solar Characteristics for Blue (Monolithic)Characteristic General More Preferred Most Preferred R_(s) (ohms/sq.):<=6.0 <=5.0 <=4.0 E_(n): <=0.06 <=0.05 <=0.04 T_(vis) (Ill. C. 2°):<=55% <=50% <=48%

Moreover, in certain example laminated embodiments of this invention,coated articles herein which have been optionally heat treated to anextent sufficient for tempering, and which have been coupled to anotherglass substrate to form an IG unit, may have the following IG unitoptical/solar characteristics.

TABLE 15 Example Optical Features for Blue (Monolithic pre or post-HT)Characteristic General Most Preferred T_(vis) (or TY)(Ill. C. 2°): <=55%<=48% R_(g)Y (Ill. C., 2 deg.): 15 to 30% 20 to 27% a*_(g) (Ill. C.,2°): −4.0 to 2.0 −3.0 to 1.0 b*_(g) (Ill. C., 2°): −22.0 to −10.0 −19.0to −15.0 L* (Ill. C. 2°): 45-62 51-59

TABLE 16 Example Optical Features (IG Unit pre or post-HT)Characteristic General Most Preferred T_(vis) (or TY)(Ill. C. 2°): <=50%<=45% L* (Ill. C. 2°): <=77 <=73 R_(f)Y (Ill. C., 2 deg.): 15 to 30% 18to 28% L* (Ill. C. 2°): 45-62 49-60 R_(g)Y (Ill. C., 2 deg.): 17 to 32%21 to 28% a*_(g) (Ill. C., 2°): −5.0 to 2.0 −3.5 to 1.0 b*_(g) (Ill. C.,2°): −22.0 to −10.0 −19 to −15.0 L*_(g) (Ill. C. 2°): 48-64 52-60

A blue-tinted coated article made according to the above embodiments(monolithically) may have a glass side reflectance Y of from about 15 to30%, more preferably from about 17-29%, and most preferably from about20 to 27% in certain example embodiments. A blue-tinted IG unit may havean outside reflectance Y of about 17 to 32%, more preferably from about19 to 30%, and most preferably from about 21 to 28%.

In certain example embodiments, a blue-tinted coated article(monolithically) may have an a*_(g) value of from about −4 to 2, morepreferably from about −3.5 to 1.5, and most preferably from about −3to 1. In certain example embodiments, a blue-tinted coated article may(monolithically) have a b*_(g) value of from about −22 to −10, morepreferably from about −21 to −12, and most preferably from about −19 to−15. In certain example embodiments, a blue-tinted coated article may(monolithically) have a L*_(g) value of from about 45 to 62, morepreferably from about 48 to 60, and most preferably from about 51 to 59.A blue-tinted IG unit may have a L*_(g) value of from about 48 to 64,more preferably from about 50 to 62, and most preferably from about 52to 60

In certain example embodiments, a blue-tinted coated article (IG unit)may have an a*_(g) value of from about −5 to 2, more preferably fromabout −4 to −1.5, and most preferably from about −3.5 to −1.0. Incertain example embodiments, a blue-tinted coated article (IG unit) mayhave a b*_(g) value of from about −22 to −10, more preferably from about−21 to −12, and most preferably from about −19 to −15.

The sheet resistance of a blue-tinted coated article according tocertain example embodiments may be less than about 6.0 ohms/square, morepreferably less than about 5.0 ohms/square, and most preferably lessthan about 4.0 ohms/square. The emissivity may be less than about 0.06,more preferably less than about 0.05, and most preferably less thanabout 0.04.

The visible transmission of an IG unit made according to one of theseexample embodiments may preferably be from about 30-45%, and even morepreferably from about 35-43%. The Solar Factor may be from about 29 to33, and thus the selectivity is at least about 1.2, more preferably atleast about 1.30, and most preferably about 1.40.

It is noted that the tables in the instant specification representcertain example embodiments, and the invention is not so limited.

Any and/or all of the silicon-based layers discussed herein may be dopedwith other materials such as stainless steel or aluminum in certainexample embodiments of this invention. For example, any and/or allsilicon-based layers discussed herein may optionally include from about0-15% aluminum, more preferably from about 1 to 10% aluminum, in certainexample embodiments of this invention. The silicon-based layer(s) may bedeposited by sputtering a target of Si or SiAl in certain embodiments ofthis invention. Oxygen may also be provided in certain instances in thesilicon nitride layers.

The foregoing descriptions of layer composition and thickness are notlimited to embodiments of a specific color.

Other layer(s) below or above the illustrated coating may also beprovided. Thus, while the layer system or coating is “on” or “supportedby” substrate 1 (directly or indirectly), other layer(s) may be providedtherebetween. Thus, for example, the coating of FIG. 1 may be considered“on” and “supported by” the substrate 1 even if other layer(s) areprovided between layer 3 and substrate 1. Moreover, certain layers ofthe illustrated coating may be removed in certain embodiments, whileothers may be added between the various layers or the various layer(s)may be split with other layer(s) added between the split sections inother embodiments of this invention without departing from the overallspirit of certain embodiments of this invention.

EXAMPLES AND COMPARATIVE EXAMPLES Examples 1-5 Bronze

A simulation of a bronze-tinted coated article was performed. Thesputtering of a low-E coating 30 as described in certain exampleembodiments of this invention onto a 6 mm clear glass substrate wassimulated. The simulated stack for a bronze-tinted coated article hadlayers with the approximate thicknesses as listed below:

TABLE 17 Example 1 Layer Thicknesses Layer Example 1 (Å) Glass (1-10 mmthick) 6 mm clear glass Si₃N₄ (layer 3) 140 Å NiCrN_(x) (layer 4) 50 ÅSi₃N₄ (layer 5) 320 Å NiCrN_(x) (layer 6) 30 Å Ag (layer 7) 130 ÅNiCrN_(x) (layer 8) 30 Å Si₃N₄ (layer 9) 480 Å

The following table contains a comparison of properties (simulated) ofthe Example 1 bronze-tinted coated article using the absorber layer anda coated article without an absorber layer as a comparative example.

TABLE 18 Comparative Example and Example 1 No Absorber Ex. 1-AbsorberCharacteristic Layer Layer T_(vis) (mono) (or TY)(Ill. C. 2°): 42.9%42.6% a*_(t) (Ill. C. 2°): −5.0 −4.5 b*_(t) (Ill. C. 2°): −10.0 1.4 L*(Ill. C. 2°): 71.5 71.3 R_(f)Y (Ill. C., 2 deg.): 12.5% 12.2% a*_(f)(Ill. C., 2°): 16.0 12.4 b*_(f) (Ill. C., 2°): 23.0 −19.5 L* (Ill. C.2°): 42.0 41.6 R_(g)Y (Ill. C., 2 deg.): 23.9% 9.6% a*_(g) (Ill. C.,2°): 4.5 1.2 b*_(g) (Ill. C., 2°): 5.0 2.8 L* (Ill. C. 2°): 56.0 37.1Solar Factor (IGU) 28 28 E_(n): 0.03 0.03

As can be seen above, through the inclusion of an absorber layer betweendielectric layers 3 and/or 5, the glass side reflectance of a coatedarticle can be reduced. The layer stack simulated according to exampleembodiments of this invention shows that a 50% reduction in glass sidereflectance is possible, as well as less reddish color on the glassside. The film side color is also improved. Moreover, the visibletransmission is substantially unaffected, and the emissivity of 0.03 isgood. In the simulation, the low-E coating was applied to asubstantially clear glass substrate. The a*_(g) value of 1.2 and ab*_(g) value of 2.8 will cause the coated article to appearbronze-colored (but less reddish) when viewed from the glassside/outside. There will be less glass side/outside reflection, which isadvantageous from architectural and aesthetic standpoints.

Test results for a bronze-tinted coated article with an absorber layerare as follows:

TABLE 19 Bronze Monolithic Example Properties Characteristic Ex. 2 Ex. 3Ex. 4 Ex. 5 T_(vis) (or TY)(Ill. C. 2°): 43.7% 44.5% 44.1% 46.9% a*_(t)(Ill. C. 2°): −4.1 −4.8 −5.1 −6.0 b*_(t) (Ill. C. 2°): 3.7 2.7 2.6 −0.2L* (Ill. C. 2°): 72.0 72.6 73.2 74.1 R_(f)Y (Ill. C., 2 deg.): 16.1%15.2% a*_(f) (Ill. C., 2°): 10.2 13.8 b*_(f) (Ill. C., 2°): −15.6 −13.5L* (Ill. C. 2°): 47.1 45.9 R_(g)Y (Ill. C., 2 deg.): 11.9% 11.9% 11.3%12.3% a*_(g) (Ill. C., 2°): 2.1 2.1 3.1 4.1 b*_(g) (Ill. C., 2°): 1.92.3 1.2 1.2 L* (Ill. C. 2°): 41.1 41.1 40.1 41.7 Sheet Resistance(Ohms/sq) 3.6 3.6 3.6 3.0

Examples 2 and 3 were incorporated into an IG unit for further testing:

TABLE 20 Bronze IG Unit Example Properties Characteristic Ex. 2 Ex. 3T_(vis) (or TY)(Ill. C. 2°): 39.8% 40.5% a*_(t) (Ill. C. 2°): −4.5 −5.2b*_(t) (Ill. C. 2°): 3.5 2.5 L* (Ill. C. 2°): 69.3 69.8 R_(f)Y (Ill. C.,2 deg.): 21.5% 20.7% a*_(f) (Ill. C., 2°): 6.1 8.4 b*_(f) (Ill. C., 2°):−11.4 −9.8 L* (Ill. C. 2°): 53.5 52.6 R_(g)Y (Ill. C., 2 deg.): 13.5%13.6% a*_(g) (Ill. C., 2°): 1.2 1.1 b*_(g) (Ill. C., 2°): 2.2 2.4 L*(Ill. C. 2°): 43.5 43.7 Solar Factor 28.3 28.8

Examples 6-10 Green

A simulation of a green-tinted coated article was performed. Thesputtering of a low-E coating 30 onto a 6 mm clear glass substrate wassimulated. The simulated stack for a green-tinted coated articleincluded layers with the approximate thicknesses as listed below:

TABLE 21 Example 6 Layer Thicknesses Layer Example 6 (Å) Glass (1-10 mmthick) 6 mm clear glass Si₃N₄ (layer 3) 280 Å NiCrN_(x) (layer 4) 50 ÅSi₃N₄ (layer 5) 1020 Å NiCrN_(x) (layer 6) 40 Å Ag (layer 7) 130 ÅNiCrN_(x) (layer 8) 40 Å Si₃N₄ (layer 9) 510 Å

The following table contains a comparison of properties (simulated) of agreen-tinted coated article using the absorber layer and a coatedarticle without an absorber layer.

TABLE 22 No Absorber Ex. 6-Absorber Characteristic Layer Layer T_(vis)(mono) (or TY)(Ill. C. 2°): 44.0% 43.8% a*_(t) (Ill. C. 2°): 1.1 −3.8b*_(t) (Ill. C. 2°): 1.2 2.6 L* (Ill. C. 2°): 72.2 72.1 R_(f)Y (Ill. C.,2 deg.): 20.1% 11.0% a*_(f) (Ill. C., 2°): 16.0 12.4 b*_(f) (Ill. C.,2°): 23.0 −19.5 L* (Ill. C. 2°): 52.0 39.6 R_(g)Y (Ill. C., 2 deg.):38.5% 32.3% a*_(g) (Ill. C., 2°): −8.0 −12.0 b*_(g) (Ill. C., 2°): −1.0−1.0 L* (Ill. C. 2°): 68.4 63.6 Solar Factor (IGU) 34 30 E_(n): 0.030.03

As can be seen above, through the inclusion of a color and/orreflectivity-adjusting absorber layer, the glass side reflectance of acoated article can be reduced. Moreover, the visible transmission issubstantially unaffected, and the emissivity of 0.03 is good.

Certain example embodiments as described herein of green-tinted coatedarticles were produced. They were coated with a zirconium oxide-basedovercoat to increase mechanical durability.

The results were as follows:

TABLE 23 Green Monolithic Example Properties Characteristic Ex. 7 Ex. 8Ex. 9 Ex. 10 T_(vis) (or TY)(Ill. C. 2°): 41.2% 44.1% 44.2% 43.4% a*_(t)(Ill. C. 2°): −3.8 −4.6 −2.9 −3.4 b*_(t) (Ill. C. 2°): −0.2 −2.4 −1.4−3.7 L* (Ill. C. 2°): 70.3 72.3 70.3 71.8 R_(f)Y (Ill. C., 2 deg.):16.6% 20.5% 17.3% 21.9% a*_(f) (Ill. C., 2°): 8.3 6.7 6.8 4.3 b*_(f)(Ill. C., 2°): −14.1 −8.4 −12.4 −6.2 L* (Ill. C. 2°): 47.8 52.4 48.653.9 R_(g)Y (Ill. C., 2 deg.): 34.6% 35.3% 34.0% 35.0% a*_(g) (Ill. C.,2°): −10.1 −8.4 −9.5 −8.4 b*_(g) (Ill. C., 2°): 1.4 0.8 −1.4 −2.0 L*(Ill. C. 2°): 65.4 66.0 65.0 65.7 Sheet Resistance (Ohms/sq) 4.0 3.1 4.13.5

Examples 7 and 8 were incorporated into an IG unit for further testing:

TABLE 24 Green IG Unit Example Properties Characteristic Ex. 7 Ex. 8T_(vis) (or TY)(Ill. C. 2°): 38.3% 41.2% a*_(t) (Ill. C. 2°): −4.1 −5.0b*_(t) (Ill. C. 2°): −0.3 −2.2 L* (Ill. C. 2°): 68.2 70.3 R_(f)Y (Ill.C., 2 deg.): 22.4% 25.9% a*_(f) (Ill. C., 2°): 4.8 3.9 b*_(f) (Ill. C.,2°): −10.9 −6.9 L* (Ill. C. 2°): 54.4 57.9 R_(g)Y (Ill. C., 2 deg.):36.7% 37.7% a*_(g) (Ill. C., 2°): −10.5 −9.1 b*_(g) (Ill. C., 2°): 1.10.5 L* (Ill. C. 2°): 67.1 67.9 Solar Factor 27.7 28.7

Visible transmission, sheet resistance, and emissivity were all good.

Example 11 Neutral

A neutral-tinted coated article was produced. The following stack wassputtered onto a 6 mm clear class substrate. The neutral-tinted coatedarticle included layers with the approximate thicknesses as listedbelow:

TABLE 25 Example 11 Layer Thicknesses Layer Example 11 (Å) Glass (1-10mm thick) 6 mm clear glass Si₃N₄ (layer 3) 240 Å NiCrN_(x) (layer 4) 10Å Si₃N₄ (layer 5) 190 Å NiCrN_(x) (layer 6) 25 Å Ag (layer 7) 150 ÅNiCrN_(x) (layer 8) 25 Å Si₃N₄ (layer 9) 580 Å

Example stacks 12 and 13 were made based on layer 11 and otherembodiments disclosed herein. The results were as follows:

TABLE 26 Neutral Monolithic Example Properties Characteristic Ex. 12 Ex.13 T_(vis) (or TY)(Ill. C. 2°): 43.2% 43.9% a*_(t) (Ill. C. 2°): −3.5−3.7 b*_(t) (Ill. C. 2°): 9.7 7.1 L* (Ill. C. 2°): 71.7 72.2 R_(f)Y(Ill. C., 2 deg.): 20.3% 22.7% a*_(f) (Ill. C., 2°): 4.5 4.4 b*_(f)(Ill. C., 2°): 24.9 23.1 L* (Ill. C. 2°): 52.2 54.8 R_(g)Y (Ill. C., 2deg.): 21.3% 22.0% a*_(g) (Ill. C., 2°): 0.1 0.6 b*_(g) (Ill. C., 2°):−3.0 −3.6 L* (Ill. C. 2°): 53.3 54.0 Sheet Resistance (Ohms/sq) 3.6 3.2

Examples 12 and 13 were incorporated into an IG unit for furthertesting:

TABLE 27 Neutral IG Unit Example Properties Characteristic Ex. 12 Ex. 13T_(vis) (or TY)(Ill. C. 2°): 40.0% 40.6% a*_(t) (Ill. C. 2°): −3.3 −3.6b*_(t) (Ill. C. 2°): 8.6 6.3 L* (Ill. C. 2°): 69.5 69.9 R_(f)Y (Ill. C.,2 deg.): 25.8% 27.8% a*_(f) (Ill. C., 2°): 1.7 1.8 b*_(f) (Ill. C., 2°):−19.9 −18.8 L* (Ill. C. 2°): 57.8 59.7 R_(g)Y (Ill. C., 2 deg.): 23.2%24.2% a*_(g) (Ill. C., 2°): −0.3 0.0 b*_(g) (Ill. C., 2°): −2.1 −2.9 L*(Ill. C. 2°): 55.3 56.3 Solar Factor 29.1 29.2

Examples 14-16 and Comparative Examples Neutral

A neutral-tinted coated article was made with the following stacks—thethicknesses are in nanometers (nm):

TABLE 28 Layer Comparative Comparative Material Example A Example B Ex.14 Ex. 15 Ex. 16 SiN_(x) 65.0 39.7 39.7 38.3 37.5 NiCr 5.0 3.8 3.8 1.51.5 Ag 12.0 6.9 12.0 12.0 12.0 NiCr 2.5 4.9 3.5 2.0 2.0 SiN_(x) 14.021.9 10.0 11.9 19.6 NiCr 1.0 3.4 2.8 SiN_(x) 20.0 13.8 8.0 6 mm glass

In Example 14, the bottom SiN_(x) layer was split, and a thin metallicNiCr-based layer was introduced as the color and/orreflectivity-adjusting absorber layer. The main function of theNiCr-inclusive layer is to reduce transmission and reflectance. Puttingthis layer between two SiN_(x) layers reduces changes in the layer uponheat treatment.

In Example 15, a NiCr-based layer was also put between two SiN_(x)layers to reduce visible transmission and glass side/outsidereflectance. Making the NiCr layer thicker (e.g., 3.4 nm instead of 1.0nm, or 34 Å instead of 10) improves the R_(out) reflected color from apositive a* (red) and slight negative b* (light blue) to a negative a*(green) and a noticeable negative b* (blue). However, the thickness ofthe NiCr-based layers surrounding the silver layer must be reduced inthis embodiment.

In Example 16, the NiCr-based layer is reduced from Example 15, and thethickness of the second silicon nitride layer was increased. Though theg-value may be increased, this stack has good visible transmission andglass side reflectance values.

Example 17 Neutral

Another example neutral-tinted coating is the following stack, with thethicknesses in nanometers:

ZrO_(x) 4.5 nm Si₃N_(x) 46.1 nm NiCr 2.0 nm Ag 18 nm NiCr 2.0 nmSi₃N_(x) 5.0 nm NbZrN_(x) 3.4 nm Si₃N_(x) 9.9 nm Glass substrate

NbZrN_(x) has a refractive index of approximately 2.81 at 550 nm, and kis approximately 2.12. The g-value (Solar Factor) of this stack isapproximately 3% better than one without an absorber layer, and thisstack permits the same visible transmission. Thus, selectivity isincreased. T_(vis) is between 41.5 and 44.5 for the monolithic coatedglass sheet. The glass side reflectance is between 19 and 22%, and thea*_(g) is between −0.5 and 1.0, and the b*_(g) is between −4.0 and −1.0.The U-value of this stack is between 1.1 and 1.2. An optimal g-value(Solar Factor) for this stack is 0.28.

Example 18 Blue

A blue-tinted coated article was produced. The following stack wassputtered onto a 6 mm clear class substrate. The blue-tinted coatedarticle had layers with the approximate thicknesses as listed below:

TABLE 29 Example 18 Layer Thicknesses Layer Example 18 (Å) Glass (1-10mm thick) 6 mm clear glass Si₃N₄ (layer 3) 270 Å NiCrN_(x) (layer 4) 12Å Si₃N₄ (layer 5) 700 Å NiCrN_(x) (layer 6) 25 Å Ag (layer 7) 130 ÅNiCrN_(x) (layer 8) 25 Å Si₃N₄ (layer 9) 430 Å

The samples were coated with a zirconium oxide overcoat to increasemechanical durability.

The blue-tinted stack including the absorber layer was simulated beforethe test, and compared to a layer stack not containing an absorberlayer. Those results were as follows:

TABLE 30 Comparative Example and Ex. 18 No Absorber Ex. 18-AbsorberCharacteristic Layer Layer T_(vis) (mono) (or TY)(Ill. C. 2°): 40.7%41.2% a*_(t) (Ill. C. 2°): −3.0 −3.9 b*_(t) (Ill. C. 2°): 1.0 −1.7 L*(Ill. C. 2°): 70.0 70.3 R_(f)Y (Ill. C., 2 deg.): 10.7% 13.8% a*_(f)(Ill. C., 2°): 15.0 16.0 b*_(f) (Ill. C., 2°): 14.0 0.5 L* (Ill. C. 2°):39.0 43.9 R_(g)Y (Ill. C., 2 deg.): 22.0% 21.4% a*_(g) (Ill. C., 2°):−0.8 −0.8 b*_(g) (Ill. C., 2°): −16.5 −16.5 L* (Ill. C. 2°): 54.0 53.4Solar Factor (IGU) 31 29 E_(n): 0.09 0.03

Example layer stacks 19 and 20 were made based on Example 18 and otherembodiments disclosed herein. The results are as follows:

TABLE 31 Blue Monolithic Example Properties Characteristic Ex. 19 Ex. 20T_(vis) (or TY)(Ill. C. 2°): 42.8% 44.6% a*_(t) (Ill. C. 2°): −3.4 −4.4b*_(t) (Ill. C. 2°): 3.0 0.9 L* (Ill. C. 2°): 71.4 72.6 R_(f)Y (Ill. C.,2 deg.): 19.1% 24.2% a*_(f) (Ill. C., 2°): 10.1 8.3 b*_(f) (Ill. C.,2°): −9.5 −6.8 L* (Ill. C. 2°): 50.8 56.3 R_(g)Y (Ill. C., 2 deg.):24.1% 25.3% a*_(g) (Ill. C., 2°): 0.5 1.2 b*_(g) (Ill. C., 2°): −17.4−15.2 L* (Ill. C. 2°): 56.2 57.4 Sheet Resistance (Ohms/sq) 4.0 3.6

While the invention has been described in connection with what ispresently considered to be the most practical and preferred embodiment,it is to be understood that the invention is not to be limited to thedisclosed embodiment, but on the contrary, is intended to cover variousmodifications and equivalent arrangements included within the spirit andscope of the appended claims.

1. A coated article comprising a coating supported by a glass substrate,the coating comprising moving away from the glass substrate: a firstdielectric layer comprising silicon nitride; a first contact layer; anIR reflecting layer comprising silver, wherein the coating has only oneIR reflecting layer comprising silver; a second contact layer, the firstand second contact layers each directly contacting the IR reflectinglayer; a second dielectric layer comprising silicon nitride; and whereinat least one of the first and second dielectric layers comprisingsilicon nitride is split by an absorber layer comprising NbZr, whereinthe absorber layer at least in part causes and/or permits color tuningof the coated article; and wherein the coated article has a selectivityof at least about 1.2, a solar factor of no greater than about 32, and aglass side reflectance (Y) of the coated article is no greater thanabout 30%.
 2. The coated article of claim 1, wherein the absorber layeris provided so that the coated article is green colored by way of ana*_(g) color value of from about −15.0 to −5.0 and a b*_(g) color valueof from about −6.0 to 3.0, and is able to achieve such coloration whenhaving only one IR reflecting layer comprising silver.
 3. The coatedarticle of claim 2, wherein the green colored coated article has ana*_(g) color value of from about −12.0 to −7.0 and a b*_(g) color valueof from about −3.0 to 1.0.
 4. The coated article of claim 2, wherein theglass substrate is substantially clear colored and the coating providesthe green coloration to the coated article.
 5. The coated article ofclaim 1, wherein the absorber layer is provided so that the coatedarticle is neutral-colored by way of an a*_(g) color value of from about−5.0 to 1.0 and a b*_(g) color value of from about −5.0 to 1.0, and isable to achieve such coloration when having only one IR reflecting layercomprising silver.
 6. The coated article of claim 5, wherein theneutral-colored coated article has an a*_(g) color value of from about−3.0 to 0 and a b*_(g) color value of from about −4.0 to
 0. 7. Thecoated article of claim 5, wherein the glass substrate is substantiallyclear colored and the coating provides the neutral coloration to thecoated article.
 8. The coated article of claim 1, wherein the absorberlayer is provided so that the coated article is blue-colored by way ofan a*_(g) color value of from about −4.0 to 2.0 and a b*_(g) color valueof from about −22.0 to −10.0, and is able to achieve such colorationwhen having only one IR reflecting layer comprising silver.
 9. Thecoated article of claim 8, wherein the blue-colored coated article hasan a*_(g) color value of from about −3.0 to 1.0 and a b*_(g) color valueof from about −19.0 to −15.0.
 10. The coated article of claim 1, whereinthe coating further comprises an overcoat comprising an oxide and/ornitride of zirconium and/or aluminum.
 11. The coated article of claim 1,wherein the absorber layer comprising NbZr is oxided and/or nitrided.12. The coated article of claim 1, wherein the coated article has aselectivity of at least about 1.4.
 13. The coated article of claim 1,wherein the coated article has a solar factor of no greater than about28.
 14. The coated article of claim 1, wherein the coated article has avisible transmission of from about 30 to 48%.
 15. The coated article ofclaim 1, wherein the absorber layer is located between the IR reflectinglayer and the glass substrate, and wherein the coating further comprisesanother absorber layer located between at least the second contact layerand at least part of the second dielectric layer.
 16. A green coloredinsulating glass (IG) window unit including first and secondsubstantially clear-colored glass substrates and a coating supported byat least the first glass substrate, the coating comprising moving awayfrom the first glass substrate: a first dielectric layer; an absorberlayer comprising NbZr; a second dielectric layer; a first contact layer;an IR reflecting layer comprising silver, wherein the coating has onlyone IR reflecting layer comprising silver; a second contact layer; and athird dielectric layer, wherein the IG unit has a visible transmissionof from about 30 to 48%, and green color by way of an a*_(g) color valueof from about −15.0 to −5.0 and a b*_(g) color value of from about −6.0to 3.0, and wherein the IG window unit is able to achieve thesecharacteristics including green color when having only one IR reflectinglayer comprising silver.
 17. The IG unit of claim 16, wherein theabsorber layer is partially oxided and/or nitrided.
 18. The IG unit ofclaim 16, wherein the coating further comprises an absorber layercomprising NiCr and/or NbZr located between at least the second contactlayer and the third dielectric layer.
 19. The IG unit of claim 18,wherein the absorber layer located between at least the second contactlayer and the third dielectric layer comprises NbZr.
 20. The IG unit ofclaim 16, wherein the absorber layer comprises NbZr, and wherein thefirst and second dielectric layers are of substantially the samematerial and each of the first and second dielectric layers directlycontacts the absorber layer.
 21. A blue-colored coated article includinga coating supported by a substantially clear-colored glass substrate,the coating comprising moving away from the glass substrate: a firstdielectric layer; an absorber layer comprising NbZr; a second dielectriclayer, wherein the absorber layer is between and directly contacting thefirst and second dielectric layers; a first contact layer; an IRreflecting layer comprising silver; a second contact layer, wherein thefirst and second contact layers each directly contact the IR reflectinglayer; a third dielectric layer; and wherein the absorber layer isprovided in a location and thickness such that the coated articleachieves blue coloration while having only one IR reflecting layercomprising silver.
 22. A coated article including a coating supported bya substantially clear-colored glass substrate, the coating comprisingmoving away from the glass substrate: a first dielectric layer; a firstcontact layer; an IR reflecting layer comprising silver, the coatinghaving only one IR reflecting layer comprising silver; a second contactlayer, wherein the first and second contact layers each directly contactthe IR reflecting layer; a second dielectric layer; a third dielectriclayer; an absorber layer comprising NiCr or NbZr, wherein said absorberlayer is located between and directly contacting said second and thirddielectric layers; and wherein the coated article is substantiallyneutral-colored and the absorber layer is provided in thickness andlocation so that the coated article achieves neutral coloration whilehaving only one IR reflecting layer comprising silver.
 23. The coatedarticle of claim 22, wherein said absorber layer comprises NbZr.
 24. Thecoated article of claim 22, wherein said absorber layer comprises NiCr.